smith



(NoModeL) w F. H. SMITH.

TUBE WELL.

PatentedMaJr. 1, 1887.

WITNESSES: fl w? ATTORNEY.

FLTERS. FhonrLithographcr. wm'

rrn TAFS Ari-unit @rrreist FREDERICK H. SMITH, OF KANSAS CITY, MISSOURI,ASSIG-NOB T ENGLISH BROS, OF SAME PLACE.

TUBE-WELL.

SPECIFICATION forming part of Letters Application filed October 9, 1886.

To all whom itmay concern.-

Be it known that I, FREDERICK H. SMITH, of Kansas City, Jackson county,Missouri, have invented certain new and useful Improvements inTube-VVells, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart hereof.

This invention relates to devices for lockingv check-valves and screensin the pumping-cylinders of tube-wells, and the object which I seek toaccomplish by it may be briefly recited as follows: to construct adriving-shoe from ready-made materials, so that its cost will becomparatively small; to so construct said shoe that it will afford asolid bearing for the screen-coupling and prevent it from being driventhrough and lost, and yet at the same time permit the bit of a drillthat is of the same diameter as the screen-coupling to pass through; toconstruct a check-tubewith improved devices for looking it in place inthe cylinder by means of rotary movement of the plunger-rod, and toprovidethe shoe, thescreencoupling,and the check-tube with suitabledevices for holding them from turning while the check-valve is beingfixed in the cylinder.

In the drawings, which illustrate the manner of carrying out myinvention, Figure 1 is a sectional elevation of my cylinder anddriving-shoe, the section being taken on line X X, Fig. 3. Fig. 2 is asectional view of the checkvalve complete and in proper position uponthe screen-coupling, the section being taken on line y y, Fig. 4. Fig. 3is a transverse section through the shoe on line X X, Fig. 1. Fig. 4 isa similar section through the junction of the check-tube and thescreen-coupling on line y y, Fig. 2; and Fig. 5 is a detail elevationof, say, a portion of the check-tube and the screencoupling, which Iexhibit merely for the purpose of showing more plainly the form of theinterlocking joints used in making up my invention.

In the ordinary shoe for tube-wells, having an annular shoulderprojecting from its inner surface for the screen-coupling to rest upon,it is impossible to pass a drill or other tool through the shoe that isof the same size or 50 larger than the bore of the cylinder, because thecutting-bit of the drill will strike upon the 'fro m passing below theshoe.

Patent No. 358,578, dated lVIarch l, 1887.

Serial No. 215,773. (No model.)

said shoulder and prevent the passage. To illustrate the matter, I willsay that it is sometimes necessaryto pass an expansion-drill through theshoe, which with the old-style 5 shoe it is impossible to do, as thehinged cutters are quite certain to strike the shoulder on the downwardstroke and prevent the drill In my construction, however, I take anordinary pipe-coup- 6o ling having suitable diameter to screw on theoutside of the cylinder A, and screw firmly into one end of it a shortpiece ofordinary pipe, 13 (whichIwill designate as the throat of theshoe.) Then I bore or turn out the end of the coupling in which thethroat-piece has been inserted, so that it will flare outwardly, asshown, and thereby form a shoe having the usual form and the ordinaryshoulder; but the shoe as thus constructed would not allow the passageof a drill, as before explained, so I next proceed to out out in someway a pair of opposite recesses, B, from the inner surface of the saidthroat-piece. This I prefer to do by means of a milling-machine or akey-seat-cutting machine. Cutting out these recesses thus increases thediameter of the throat of the shoe a considerable amount in the placewhere the recesses are located, and consequently a drill or other toolthat is somewhat flat and thin can be passed through, or it can beworked up and down in the throat until a hole is formed below the shoe,as may be required.

In this connectionl may say that the shoe 8 5 G, or a shoe having thesame form, can be cast in one solid piece with the recesses B, and allcomplete, if desired; but I would prefer the before-mentionedconstruction, because of its small cost and by reason of the materialsbe- 0 ing always near at hand.

The upper end of the screen K is screwed into the screen-coupling H inthe usual manner; but the lower edge of said coupling is provided with apair of oppositely-located re- 9 5 cesses, t, the formation of whichengenders the creation of a pair of oppositely-located projections ortongues, t,- and it is obvious that when the screen-coupling is locatedin its place in the cylinder its lower edge will rest upon I00 7 theshoulders d. Now, upon turning the screen-coupling a little theprojections t will drop into and engage the recesses B, as shown, thuspreventing the further turning of the said coupling unless the entireshoe and cylinder be rotated with it; but the screen-coupling and theshoe can be separated, at any time that it may be necessary to removesaid screen, by simply raising the said screen straight up.

For the purpose of preventing the checktube L from turning while therubber packing-ring L is being expanded, I also make the upper end ofthe said coupling in the same manner-that is, I provide it with a pairof water-passage of the tube.

Encircling the body of the check-lube is the rubber packing-ring L,whichflares outwardly from its inner surface, and which is provided with arounded upper edge, a, for the purpose of preventing friction with thesides of the pipe and cylinder when the check-valve is to be removedtherefrom. The rounded edge a, coming in frictional contact with thesides of the pipe,will not be so liable to damage and to be torn aswould the edge of a ring of ordinary construction.

The lower edge of the cage b is provided with a cone, 6, or it may besaid to flare outwardly and upwardly, and said cone is adapted to engagethe flaring surface of the packingring L when said cage is screweddownwardly upon the check-tube, and thereby cause the said ring to beexpanded forcibly against the sides of the cylinder A, thus securelylocking the entire check-valve securely in place, and forming awater-tight joint between the valve and the sides of the cylinder.

Of course, by unscrewing the cage from the check-tube at any time, thecheck-valve can be removed from its place, and in pulling the valveupwardly the packing-ring L will be raised, with the other devices withwhich it is connected, by reason of its lower edge resting upon thelarge shoulder 40, formed upon the check-tube L.

For the purpose of placing the check-valve in the pipe or cylinder of atube-well, I pro-.

vide the upper portion of the cage 1) with a left-hand thread, 20, whichis engaged by a similar thread on the lower end of the pumprod E, andwith this construct-ion the operation of placing the check-valve in thecylinder' will be as follows: First, the screen K is dropped in the pipewith coupling H attached thereto. Then the rod E is screwed into thecage Z), and the check-valve entire is lowered into the pipe. Of coursethe rod E should be screwed into the cage as tightly as possible, sothat it will not be disengaged therefrom in screwing down the cage uponthe check-tube. Then by turning the rod around slowly thescreen-coupling H will find its seat in the throat of the shoe, and sobe prevented from turning, and also in a like manner the recesses in thelower edge of the check-tube will engage the projections ton the upperedge of the 'said coupling, and the whole will be practically lockedtogether and will be prevented from turning, thereby allowing the cageto be screwed firmly to place upon the check-tube and expanding thepacking-ring L tightly against the sides of the cylinder.

The cage is not permitted to be screwed too far down upon the check-tubeby reason of the shoulder 12 coming in contact with the upper edge orshoulder, 10, formed upon the upper edge of the said tube, and whenthese two shoulders come in contact the rod E may be unscrewed from thecage and withdrawn from the pipe. The thread on the end of the rod Ebeing a left-handed one, it will only be necessary to continue turningsaid rod toward the right hand to detach it from the cage.

When the screen-coupling isin place in the cylinder and in the shoe, theupper side of the recesses or the lower edge, 14., of the saidtube-wells, consisting of a main body threaded internally its entirelength, throat-piece B having shoulders at and recesses B, and the endof both body and throat-piece turned or bored to flare outwardly,substantially as set forth.

4. The screen-coupling H, provided with opposite recesses 15 in itslower edge and with recesses tin its upper edge, substantially asdescribed.

5. The packing-ring L, provided with a rounded upper edge, a, for thepurpose described.

6. Gylinder A, shoe G, screen-coupling H, check-tube L, and cage b, allconstructed and combined substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

FREDERICK H. SMITH.

Witnesses:

J. W. NORTON, JAMES F. MIsTER.

